Review Detail of Cosray8d in I, Your Father, Carry a Big Stick

This fic is basically a sociopathic Gary Stu hunting for waifus and make them as strong as possible while being a fighting maniac. It's very well written and for a harem fic with so many waifus it's girls are also mostly well established and characterized. The only problem I have is the end of Orochimaru and what happened with Guren and this Yuki girl from Oto because they apparently were forgotten.